CN104261938B - Production method for preparation of calcium dihydrogen phosphate and by-production of special fertilizer for cauliflowers - Google Patents
Production method for preparation of calcium dihydrogen phosphate and by-production of special fertilizer for cauliflowers Download PDFInfo
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- CN104261938B CN104261938B CN201410477796.XA CN201410477796A CN104261938B CN 104261938 B CN104261938 B CN 104261938B CN 201410477796 A CN201410477796 A CN 201410477796A CN 104261938 B CN104261938 B CN 104261938B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G1/00—Mixtures of fertilisers belonging individually to different subclasses of C05
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Abstract
The invention relates to the technical field of chemical industry and particularly relates to a production method for preparation of calcium dihydrogen phosphate and by-production of a special fertilizer for cauliflowers. According to the production method, by analyzing the fertilizer demand situation of the cauliflowers and combining with the shortcomings in a preparation process of a calcium dihydrogen phosphate product, a preparation process of the calcium dihydrogen phosphate product and a preparation process of the special fertilizer for the cauliflowers are combined for production, so that the added value of the product in the preparation process of the calcium dihydrogen phosphate product is improved, the purity of the calcium dihydrogen phosphate product is improved, the waste of phosphorus and calcium element resources is reduced, the emission of waste liquid is reduced, and the serious pollution of the ecological environment is avoided.
Description
Technical field
The present invention relates to chemical technology field, especially one kind prepare dalcium biphosphate by-product cauliflower
The production method of special fertilizer.
Background technology
Cauliflower (scientific name：Brassica oleracea L.var.botrytis L.), also known as Brassica oleracea L. var. botrytis L., flower
Dish, coconut palm Herba Astragali Sinici, Caulis et Folium Brassicae capitatae flower, foreign Herba Astragali Sinici, broccoli.It is a kind of vegetable of Cruciferae,
Belong to annual plant, be all the mutation of Caulis et Folium Brassicae capitatae with broccoli and common head cabbage.It is a kind of crude fibre
Content is few, and quality is fresh and tender, nutritious, and local flavor is delicious, the vegetable of people's eating.In cauliflower
In planting process, in order to promote expanding of bouquet, it is typically with efficient nitrogen-phosphorus-potassium compound fertilizer and enters
Row is applied, and general whole process needs to apply fertilizer 4 times, and fertilising is generally according to azophoska for the first time
Ratio be 1:2-2.4:2-2.4；Second fertilising generally ratio according to azophoska is 3:4:1；
Third time fertilising is 1 using nitrogen phosphoris and potassium fertilizer ratio：1:1 ratio carries out fertilizer treatment；4th time will
Can be 5 using nitrogen phosphoris and potassium fertilizer ratio:1:0.8 fertilizer fertilising, and while third and fourth fertilising,
The trace element such as a large amount of Boraxs also can be added to carry out fertilizer treatment together；But above fertilising every time
The nitrogen phosphoris and potassium fertilizer ratio fertilizer processing is all according to certain proportional quantities using nitrogenous fertilizer, phosphate fertilizer, potash fertilizer
It is formulated, and then is made during fertilising, it will led to certain in n-p-k element
A kind of element is because for preparing is unbalanced, and has led in the angle meeting cauliflower demand and mistake
Amount, remains in soil, and long-term and soil carries out erosion or other biochemical reactions occur, and then
Cause to be improved with fertile cost, and have impact on Soil structure layer, environmental destruction is serious.
Meanwhile, in the preparation technology of biphosphate calcium product, it is typically with being using wet method phosphorus
Sour or thermal phosphoric acid preparation, its impurity content is larger, to be substituted using intermediate for this and to turn
Change the preparation of biphosphate calcium product, improve the purity of biphosphate calcium product, but such
Technique is to separate out biphosphate calcium product by crystallization, therefore, in order to improve di(2-ethylhexyl)phosphate
The yield of hydrogen calcium product, reduces the waste of phosphorus calcium element, reduces the discharge capacity of waste liquid, reduces phosphorus
Acid dihydride calcium product production cost it is often desirable that processed so that in solution by depth crystallization
Biphosphate calcium product separates out in a large number, but, this process is often along with other products
Separate out, and then reduce the purity of biphosphate calcium product so that dalcium biphosphate is difficult to meet
Food stage, feed grade, the even standard requirement of PHOSPHORIC ACID TECH.GRADE dihydro calcium product.
For this reason, this researcher through efforts of many years with research, in conjunction with cauliflower growth course seek
Shortcomings present in the conditions of demand of foster element and biphosphate calcium product preparation technology
Carry out research and discovery, the preparation technology of cauliflower special fertilizer and biphosphate calcium product is combined
Together, be the preparation of biphosphate calcium product and the preparation technology of cauliflower special fertilizer provides one kind
New approaches.
Content of the invention
In order to solve above-mentioned technical problem present in prior art, the present invention provides one kind to prepare
The production method of dalcium biphosphate by-product cauliflower special fertilizer, has and can need fertile requirement according to cauliflower
Carry out the preparation of the special compound state composite fertilizer of cauliflower, and the preparation technology by biphosphate calcium product
Combine with the preparation technology of the special compound state composite fertilizer of cauliflower, make full use of dalcium biphosphate
Waste liquid in product preparation process is so that the dalcium biphosphate in unnecessary depth crystallization solution produces
Product, are also not result in the wasting of resources of phosphorus calcium element, also ensure that the pure of biphosphate calcium product
Degree is improved, and reduces the features such as the discharge of waste liquid amount.
It is achieved particular by technical scheme below：
A kind of production method preparing dalcium biphosphate by-product cauliflower special fertilizer, using phosphoric acid and carbon
Amide is (1.4-2.0) according to mol ratio：1 mixing, is 80-100 DEG C in temperature, stirring reaction
2-3h, obtains intermediate slip；Mixed with soluble calcium salt using this intermediate slip again, control
When pH value is 3-3.5, after continuing stirring reaction 10-15min, reaction terminates, and obtains phosphoric acid
The slip of hydrogen calcium, and the slip of phosphoric acid hydrogen calcium is placed in cooler crystallizer carries out decrease temperature crystalline
Filtration treatment, makes filtrate circulation crystallization process in cooler crystallizer, and tests and analyzes adjustment filter
Liquid, when the mol ratio of nitrogen, phosphorus pentoxide, calcium ion is (0.9-1.1)：(0.9-1.1)：(0.
When 01-0.03), stop crystallizing and filtering, the filter cake of acquisition is calcium monophosphate product, to filtrate
Middle addition potassium composition and middle trace compound are adjusted to compound state composite fertilizer just finished product, wherein
The potassium composition content adding is 2. with the content of nitrogen P elements than forming mol ratio for n-p-k element
5:(2-2.1):(1-1.3)；And first finished product is placed in baker, it is 3 using programming rate
DEG C/min is warming up to 40-50 DEG C, after 1-2h is dried, adjustment moisture is 1-3%, you can system
Obtain the special compound state composite fertilizer of cauliflower.
Specifically include following steps：
(1) raw material preparation mixing：Phosphoric acid and phosphoamide are (1.4-2.0) according to mol ratio：
1 in stirring-type reaction kettle, is 80-100 DEG C in temperature, and the mixing speed of control stirred tank is
180-200r/min stirs hybrid reaction 2-3h, obtains intermediate slip；
(2) prepare calcium hydrogen phosphate：At the uniform velocity added containing step 1 using soluble calcium salt 2-3h again)
In the reactor of prepared intermediate slip, when controlling pH value for 3-3.5, continue stirring reaction
After 10-15min, reaction terminates, and obtains the slip of phosphoric acid hydrogen calcium；
(3) circulation crystallization filters：By step 2) obtain phosphoric acid hydrogen calcium slip be placed in cooling
It is cooled to temperature≤20 DEG C, down cycles crystallizing filtration treatment in 10s in crystallizer, and detect
Nutrient content in analysis filtrate, treats nitrogen component, phosphorus pentoxide composition, the quality of calcium component
Than for (0.9-1.1)：(0.9-1.1)：(0.01-0.03), when, stop crystallizing and filtering, obtain
Filter cake is calcium hydrogen phosphate, adds potassium composition and middle trace compound adjustment fertilizer in filtrate
Structure becomes compound state composite fertilizer just finished product, the wherein potassium composition content of addition and nitrogen P elements
Content is 2.5 than the ratio for n-p-k element:(2-2.1):(1-1.3)；
(4) filtrate dries：By step 3) just finished product is placed in drying for the compound state composite fertilizer that obtains
In device, it is warming up to 40-50 DEG C using programming rate for 3 DEG C/min, after 1-2h is dried, adjust water
Point content is 1-3%, you can the special compound state composite fertilizer of prepared cauliflower.
Described soluble calcium salt is calcium bicarbonate, calcium hydroxide, calcium chloride, in calcium sulfide one
Kind.
Described potassium composition be potassium hydroxide, potassium bicarbonate, potassium chloride, potassium acetate, plant ash,
One of potassium carbonate or two kinds of mixture.
Described compound state composite fertilizer, contains following N P and K compound state structural formula in its composition：
Wherein, the dotted line between carbon atom and oxygen atom represents that C is former
There is coordinate bond between son and O atom.
Add middle trace element when, can using add attapulgite, humic acid, kieselguhr,
Lignin, calcium-base bentonite, leaveves rot mud, become thoroughly decomposed animal excretion, its addition be waste liquid
The 13% about of total amount.
Add during potassium composition it should be ensured that after adding potassium composition and middle micro-nutrient in waste liquid,
Nitrogen phosphoris and potassium fertilizer ratio is 2.5:(2-2.1):(1-1.3), and then guaranteeing to tie containing compound state constitute
While dividing, yet can cover has other npk nutrients, and then cauliflower plant is being absorbed
During n-p-k element, the n-p-k element remaining in soil can be enable to carry out equal proportion amount
Reduction, and then make the element remaining in soil compensate for theory of barrel short plate, enter without
Cause environmental pollution, there is the significant value of environmental protection, also improve cauliflower plantation quality simultaneously,
Reduce cauliflower planting cost, improve income.
Compared with prior art, the technique effect of technical scheme is embodied in：
1st, by being analyzed to the fertilizer requirement of cauliflower, and combine biphosphate calcium product
Shortcoming present in preparation technology, by the preparation technology of biphosphate calcium product and cauliflower special fertilizer
Preparation technology combine and produced, improve in biphosphate calcium product preparation technology
Added value of product, improves the purity of biphosphate calcium product, reduces phosphorus calcium element resource
Waste, reduce the discharge capacity of waste liquid, it is to avoid the severe contamination of ecological environment.
2nd, by detecting to solution in whole production process or the nutrient in waste liquid
And analysis, and while biphosphate calcium product is separated out by crystallization, to remaining in waste liquid
The elements such as phosphorus, calcium, nitrogen are tested and analyzed, and adjust the relative amount of element therein, make
The content of element disclosure satisfy that cauliflower to nitrogen phosphorus calcium element demand, then by add potassium element with
And in other trace element come to adjust the trophic structure layer in waste liquid so that in waste liquid nutrition knot
Structure disclosure satisfy that the plantation demand of cauliflower, improves the absorbance of cauliflower, promote cauliflower yield and
Cauliflower quality, the element residuing among soil that reduction Fertilization Effect is brought increases, Jin Eryu
Soil structure layer carries out biochemical reaction, and caused Soil structure is hardened and the sending out of contaminated soil situation
Raw rate.
3rd, pass through technical parameter in compound state composite fertilizer production technology, that is, be exactly temperature, raw material
The control of concentration and proportioning is so that after phosphoric acid and urea reaction, generate urea phosphate product, phosphorus
Sour urea product has stronger acidity in itself, and is by coordinate bond between phosphoric acid and carbamide
The compound state double salt that mode is combined together to form, is also fertile as crop in conventional art,
And crop the absorbance of this compound state double salt is compared the unitary such as carbamide, ammonium carbonate, ammonium nitrate,
All preferably a kind of compound state composite fertilizer of binary fertilizer absorbance, however, this compound state double salt
In the environment of phosphoric acid exists, it may occur that the decomposition of complexity is polymerized at a temperature of 80-250 DEG C
Reaction is so that urea phosphate forms (H2PO4)-(H2NCONH3)+Two ions,
(H2NCONH3)+Ion is close with phosphoric acid, and in the environment of temperature is for 80-160 DEG C, shape
BecomeIntermediate-ion and dihydrogen phosphate, and formed between C and O
Coordinate bond, this intermediate-ion can with centering element compound chelate formed multielement in the middle of from
Son, and then can continue to the compound negatively charged with other or ion formation chelate, carry
Constituent content in high double salt, and then the nutrient content in the double salt of this ion presence can be adjusted,
Meanwhile, this chelate can be hydrolyzed and absorbed by crops again, and then can be effectively long-term
There is provided fertilizer efficiency for crop, meanwhile, in conjunction with the mensure of constituent content in the solution that this ion is existed,
And then each element content during adjustment double salt formation, dry and obtain containing compound state double salt structure
Compound fertilizer, improves the quality of cauliflower special fertilizer.
Specific embodiment
Technical scheme is further limited with reference to specific embodiment
Fixed, but claimed scope is not only limited to description.
Principle explanation：
The present invention carries out research and discussion by the mechanism that phosphoric acid and phosphoamide are reacted, and combines
Prior art literature is recognized, phosphoric acid and phosphoamide react generation urea phosphate, and its molecular formula is：
CO(NH2)2.H3PO4, the change between H and O in the environment of higher temperature, in phosphoric acid
Learn key can dialysis, hydrion and carbamide combine to form the ionic state containing positive charge so that phosphoric acid
Urea forms the ion double salt that a kind of positive and negative charge phase attracts, and its mechanism structural response is expressed as below
Formula：CO(NH2)2.H3PO4→(H2PO4)-.(H2NCONH3)+
Further, urea phosphate ion double salt is in the environment of phosphoric acid presence, therein
(H2NCONH3)+Cation is close with phosphoric acid, forms the intermediate-ion of C → O coordinate bond,
It is (CO5PN2H8)+, and then make to contain substantial amounts of (H in urea phosphate intermediate2PO4)-(CO5PN2H8)+Ion, when adding excessive and appropriate calcium ion, biphosphate
Root and calcium ion form calcium hydrogen phosphate crystal and are precipitated, and by testing and analyzing the nitrogen in filtrate
The content of phosphorus calcium element, and according to cauliflower demand add potassium element, magnesium elements, ferrum element with
And trace element in other, the trophic structure in adjustment filtrate is so that trophic structure layer meets dish
The demand of flower, then dry the cauliflower customizations that can be prepared by containing N, P, K and other elements
He Tai compound fertilizer.
Its specific reaction principle will enter one by following reaction structure formula and reaction mechanism
The explanation of step：
Reaction equation one：
CO(NH2)2+H3PO4→CO(NH2)2.H3PO4
Reaction equation two：
Reaction equation three：
Wherein, the dotted line between carbon atom and oxygen atom represents exist between C atom and O atom
Coordinate bond.
Reaction equation four：
Calcium monophosphate product to be crystallized out after, then in filtrate add potassium element, Yi Jiqi
His element, then can with the dihydrogen phosphate remaining in filtrate, hydrogen phosphate andIntermediate-ion reacted, generate Multiple salts forms compound state
Cauliflower composite fertilizer special.
Noun explanation：
Urea phosphate (Urea phosphate, UP), No. CAS is 4861-19-2, and molecular formula is
CH7N2O5P, is represented by CO (NH2)2·H3PO4：
It is a kind of fine chemical product being widely used in the fields such as animal husbandry, industry, agricultural,
Its solid is white crystals or crystalline powder, and soluble in water and alcohol, insoluble in ethers, toluene
And carbon tetrachloride, aqueous solution is in acidity, starts to decompose to give off carbon dioxide and ammonia during melting.
Embodiment：The present invention is further elaborated with specific operation embodiment below.
Embodiment 1
A kind of production method preparing dalcium biphosphate by-product cauliflower special fertilizer, walks including following
Suddenly：
(1) raw material preparation mixing：Phosphoric acid and phosphoamide are 1.4 according to mol ratio：1 is stirring
Mix in formula reactor, be 80 DEG C in temperature, control the mixing speed of stirred tank to stir for 180r/min
Mix hybrid reaction 2h, obtain intermediate slip；
(2) prepare calcium hydrogen phosphate：At the uniform velocity added containing step 1 using soluble calcium salt 2h again) system
In the reactor of intermediate slip obtaining, when controlling pH value for 3, continue stirring reaction 10min
Afterwards, reaction terminates, and obtains the slip of phosphoric acid hydrogen calcium；
(3) circulation crystallization filters：By step 2) obtain phosphoric acid hydrogen calcium slip be placed in cooling
It is cooled to 20 DEG C of temperature, down cycles crystallizing filtration treatment in 10s in crystallizer, and detect point
Nutrient content in analysis filtrate, treats nitrogen component, phosphorus pentoxide composition, the mass ratio of calcium component
For 0.9：1.1：When 0.03, stop crystallizing and filtering, acquisition filter cake is calcium hydrogen phosphate, to filter
Potassium composition and middle trace compound adjustment fertilizer structure is added to become compound state and be combined in liquid
The content of fertile just finished product, the wherein potassium composition content of addition and nitrogen P elements ratio is for n-p-k element
Ratio be 2.5:2:1；
(4) filtrate dries：By step 3) just finished product is placed in drying for the compound state composite fertilizer that obtains
In device, it is warming up to 40 DEG C, after 1h is dried using programming rate for 3 DEG C/min, adjustment moisture contains
Measure as 1%, you can the special compound state composite fertilizer of prepared cauliflower.
Described soluble calcium salt is calcium hydroxide.
Described potassium composition be potassium hydroxide, potassium bicarbonate, potassium chloride, potassium acetate, plant ash,
The mixture of potassium carbonate equal proportion amount.
In interpolation during trace element, use interpolation attapulgite, humic acid, kieselguhr,
Lignin, calcium-base bentonite, leaveves rot mud, become thoroughly decomposed animal excretion, its addition be waste liquid
The 13% of total amount.
Embodiment 2
A kind of production method preparing dalcium biphosphate by-product cauliflower special fertilizer, walks including following
Suddenly：
(1) raw material preparation mixing：Phosphoric acid and phosphoamide are 2.0 according to mol ratio：1 is stirring
Mix in formula reactor, be 100 DEG C in temperature, the mixing speed controlling stirred tank is 200r/min
Stirring hybrid reaction 3h, obtains intermediate slip；
(2) prepare calcium hydrogen phosphate：At the uniform velocity added containing step 1 using soluble calcium salt 3h again) system
In the reactor of intermediate slip obtaining, when controlling pH value for 3.5, continue stirring reaction 15min
Afterwards, reaction terminates, and obtains the slip of phosphoric acid hydrogen calcium；
(3) circulation crystallization filters：By step 2) obtain phosphoric acid hydrogen calcium slip be placed in cooling
It is cooled to 19 DEG C of temperature, down cycles crystallizing filtration treatment in 10s in crystallizer, and detect point
Nutrient content in analysis filtrate, treats nitrogen component, phosphorus pentoxide composition, the mass ratio of calcium component
For 1.1：0.9：When 0.01, stop crystallizing and filtering, acquisition filter cake is calcium hydrogen phosphate, to filter
Potassium composition and middle trace compound adjustment fertilizer structure is added to become compound state and be combined in liquid
The content of fertile just finished product, the wherein potassium composition content of addition and nitrogen P elements ratio is for n-p-k element
Ratio be 2.5:2.1:1.3；
(4) filtrate dries：By step 3) just finished product is placed in drying for the compound state composite fertilizer that obtains
In device, it is warming up to 50 DEG C, after 2h is dried using programming rate for 3 DEG C/min, adjustment moisture contains
Measure as 3%, you can the special compound state composite fertilizer of prepared cauliflower.
Described soluble calcium salt is calcium bicarbonate.
Described potassium composition is potassium hydroxide, and concentration is 30%.
In the middle trace element adding, use interpolation attapulgite, humic acid, diatom
Soil, lignin, calcium-base bentonite, leaveves rot mud, become thoroughly decomposed animal excretion, its addition is
The 15% of waste liquid total amount.
Embodiment 3
A kind of production method preparing dalcium biphosphate by-product cauliflower special fertilizer, walks including following
Suddenly：
(1) raw material preparation mixing：Phosphoric acid and phosphoamide are 1.7 according to mol ratio：1 is stirring
Mix in formula reactor, be 90 DEG C in temperature, control the mixing speed of stirred tank to stir for 190r/min
Mix hybrid reaction 2.5h, obtain intermediate slip；
(2) prepare calcium hydrogen phosphate：At the uniform velocity added containing step 1 using soluble calcium salt 2.5h again)
In the reactor of prepared intermediate slip, when controlling pH value for 3.3, continue stirring reaction
After 12min, reaction terminates, and obtains the slip of phosphoric acid hydrogen calcium；
(3) circulation crystallization filters：By step 2) obtain phosphoric acid hydrogen calcium slip be placed in cooling
It is cooled to 18 DEG C of temperature, down cycles crystallizing filtration treatment in 10s in crystallizer, and detect point
Nutrient content in analysis filtrate, treats nitrogen component, phosphorus pentoxide composition, the mass ratio of calcium component
For 1：1：When 0.02, stop crystallizing and filtering, acquisition filter cake is calcium hydrogen phosphate, in filtrate
Potassium composition and middle trace compound adjustment fertilizer structure is added to become at the beginning of compound state composite fertilizer
The content of the potassium composition content of finished product, wherein addition and nitrogen P elements is than the ratio for n-p-k element
For 2.5:2.05:1.2；
(4) filtrate dries：By step 3) just finished product is placed in drying for the compound state composite fertilizer that obtains
In device, it is warming up to 45 DEG C, after 1.5h is dried using programming rate for 3 DEG C/min, adjust moisture
Content is 2%, you can the special compound state composite fertilizer of prepared cauliflower.
Described soluble calcium salt is calcium sulfide.
Described potassium composition is potassium chloride, the equal proportion amount of potassium acetate, plant ash, potassium carbonate is mixed
Compound.
In interpolation during trace element, use interpolation attapulgite, humic acid, kieselguhr,
Lignin, calcium-base bentonite, leaveves rot mud, become thoroughly decomposed animal excretion, its addition be waste liquid
The 12% of total amount.
Test example：Carry out the skill to technical scheme with reference to specific embodiment content
Art effect and product attribute are described further.
The special compound state composite fertilizer of cauliflower of the test example present invention affects on the growth situation of cauliflower
Situation and the situation of cauliflower yield and fertilizer application amount.
Experimental group：The cauliflower specific complex prepared using embodiment 1, embodiment 2, embodiment 3
Fertilizer, according to traditional cauliflower sddes technology, is planted 2 mu of cauliflower using farm manure as base manure, and is pressed
Add cauliflower composite fertilizer special 120kg according to every mu and carry out Cultivate administration.
Matched group：Using tradition such as potassium dihydrogen phosphate, ammonium dihydrogen phosphate, ammonium nitrate, potassium sulfate
Chemical fertilizer prepared according to cauliflower nutrient demand ratio, using farm manure as base manure plant cauliflower
2 mu, and carry out Cultivate administration according to every mu of cauliflower interpolation preparation fertilizer 120kg.
The consumption of above farm manure is experimental group and matched group equivalent uses.
Observe the upgrowth situation of cauliflower：The experimental group cauliflower speed of growth is very fast, and leaf color is bottle green,
Plant wide cut reaches 15-28cm；The matched group cauliflower speed of growth is also very fast, and leaf color maintains for a long time
In green, plant wide cut reaches 12-24cm；Therefore deduce that, the cauliflower of the present invention is special
Compound fertilizer can promote the fast-growth of cauliflower, improves cauliflower growing environment quality.
After cauliflower maturation, take cauliflower, and cauliflower is carried out weigh with quality, to be planted two
Mu cauliflower is all plucked till completing, and experimental group and matched group plantation are obtained all cauliflowers
Weight is added, and calculate per mu yield it can be deduced that, the total output of experimental group cauliflower is 451.6kg,
The cauliflower total output of matched group is 368.8kg, and every per mu yield is respectively 225.8kg and 184.4kg,
Mu units increased in production is 41.4kg；And contrast is carried out to every plant of yield in recording process check, experiment
Every plant of yield of cauliflower of group is 1.8-3.2kg；Every plant of yield of the cauliflower of matched group is 1.3-2.1kg；
Thus can also draw, compared with the cauliflower special fertilizer of the present invention is carried out with fertilizer with traditional cauliflower, energy
Enough improve cauliflower per mu yield so that every plant of yield all improves 0.5-1.1kg.
Here it is important to point out that, above example and test example are only limitted to the skill to the present invention
Art scheme and technique effect are further elaborated and understand it is impossible to be interpreted as the skill to the present invention
Art scheme is further limited, the modification made within the essentiality content of the present invention and changing
Enter, still fall within the protection category of the present invention.
Claims (5)
1. a kind of production method preparing dalcium biphosphate by-product cauliflower special fertilizer is it is characterised in that adopt phosphorus
Acid and phosphoamide are (1.4-2.0) according to mol ratio：1 mixing, is 80-100 DEG C in temperature, stirring reaction 2-3
H, obtains intermediate slip；Mixed with soluble calcium salt using this intermediate slip again, control ph is 3-3.
When 5, after continuing stirring reaction 10-15min, reaction terminates, and obtains the slip of phosphoric acid calcium dihydrogen, and will
The slip of phosphoric acid calcium dihydrogen is placed in cooler crystallizer and carries out decrease temperature crystalline filtration treatment, makes filtrate in cooling
Circulation crystallization process in crystallizer, and test and analyze adjustment filtrate, when nitrogen component, phosphorus pentoxide composition,
The mass ratio of calcium component is (0.9-1.1)：(0.9-1.1)：(0.01-0.03), when, stop crystallizing and filtering, obtain
The filter cake obtaining is biphosphate calcium product, adds potassium composition and middle trace compound to be adjusted to in filtrate
Compound state composite fertilizer just finished product, the wherein potassium composition content of addition are more first than for N P and K with the content of nitrogen P elements
It is 2.5 that element forms mol ratio:(2-2.1):(1-1.3)；And first finished product is placed in baker, using the speed that heats up
Spend and be warming up to 40-50 DEG C for 3 DEG C/min, after 1-2h is dried, adjustment moisture is 1-3%, you can prepared dish
Spend special compound state composite fertilizer.
2. prepare the production method of dalcium biphosphate by-product cauliflower special fertilizer, its feature as claimed in claim 1
It is, comprise the following steps：
(1) raw material preparation mixing：Phosphoric acid and phosphoamide are (1.4-2.0) according to mol ratio：1 in stirring-type
In reactor, it is 80-100 DEG C in temperature, control the mixing speed of stirred tank to stir mixing for 180-200r/min
Reaction 2-3h, obtains intermediate slip；
(2) prepare dalcium biphosphate：At the uniform velocity added using soluble calcium salt 2-3h again and be obtained containing step (1)
The reactor of intermediate slip in, control ph be 3-3.5 when, continue stirring reaction 10-15min after, instead
Should terminate, obtain the slip of phosphoric acid calcium dihydrogen；
(3) circulation crystallization filters：The slip that step (2) is obtained phosphoric acid calcium dihydrogen is placed in crystallisation by cooling
It is cooled to temperature≤20 DEG C, down cycles crystallizing filtration treatment in 10s in device, and test and analyze supporting in filtrate
Divide content, treat that nitrogen component, phosphorus pentoxide composition, the mass ratio of calcium component are (0.9-1.1)：(0.9-1.1)：
(0.01-0.03) when, stop crystallizing and filtering, acquisition filter cake is dalcium biphosphate, add potassium in filtrate
Composition and middle trace compound adjustment fertilizer structure become compound state composite fertilizer just finished product, wherein addition
Potassium composition content is 2.5 with the content of nitrogen P elements than the mol ratio for n-p-k element:(2-2.1):(1-1.3)；
(4) filtrate dries：Just finished product is placed in baker the compound state composite fertilizer that step (3) is obtained,
It is warming up to 40-50 DEG C using programming rate for 3 DEG C/min, after 1-2h is dried, adjustment moisture is 1-3%,
Can be prepared by the special compound state composite fertilizer of cauliflower.
3. prepare the production method of dalcium biphosphate by-product cauliflower special fertilizer as claimed in claim 1 or 2, its
It is characterised by, described soluble calcium salt is one of calcium bicarbonate, calcium hydroxide, calcium chloride, calcium sulfide.
4. prepare the production method of dalcium biphosphate by-product cauliflower special fertilizer as claimed in claim 1 or 2, its
Be characterised by, described potassium composition is potassium hydroxide, potassium bicarbonate, potassium chloride, potassium acetate, plant ash,
One of potassium carbonate or two kinds of mixture.
5. prepare the production method of dalcium biphosphate by-product cauliflower special fertilizer as claimed in claim 1 or 2, its
It is characterised by, described compound state composite fertilizer, in its composition, contain following N P and K compound state structural formula：
Wherein, the dotted line between carbon atom and oxygen atom represents that C atom and O are former
There is coordinate bond between son.
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| US4507139A (en) * | 1984-05-21 | 1985-03-26 | Tennessee Valley Authority | Acid type solid urea-nitric fertilizer |
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